So since we're looking at char `3` now of the input string, we can visualize the decoded string to be split up like this: If we treat each duplicated string as it's own string, then K can point to any ...
Given a string `s`, the task is to find the longest palindromic substring in `s`. 1. We define a helper function `expandFromCenter` that takes a string `s`, and two indices `start` and `end` as input.
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